This is an on-line analytical tool that allows users to convert units of thermodynamics, fluid mechanics, economics and other units. Some of these are Energy, Pressure, Volume, Density, Enthalpy and Viscosity.

Based on skin fold measurements, this CGI script allows visitors to calculate their percentage of body fat. The accuracy is largely based on the accuracy of the measurements and therefore, usage of calipers is recommended. This is a good way to add content to a health site.

This allows you to calculate pipe friction losses for straight piping that handle water and also that handle water with varying percentages of ethylene glycol. Based on some inputs, it calculates the velocity, the Reynolds number and many more.

This Perl program facilitates calculation of the distance between two zip codes in the United States. It can also be used to calculate the distance between any two latitude and longitude coordinates with an accuracy of 50 meters.